Samsung Electro-Mechanics CL21A105KOFNNNF

CL21A105KOFNNNF Samsung Electro-Mechanics Product Introduction

The Samsung Electro-Mechanics CL21A105KOFNNNF is a surface-mount multilayer ceramic capacitor (MLCC) with a capacitance of 1μF, rated at 16V, utilizing X5R dielectric and packaged in an 0805 (2012 metric) footprint. Designed for general-purpose electronic applications, this MLCC satisfies the growing need for reliable decoupling, noise reduction, and energy storage in compact formats. As part of Samsung’s extensive MLCC portfolio, the CL21A105KOFNNNF balances high capacitance value, miniaturization, and robust performance, meeting the evolving demands for consumer, industrial, and networking products.

Main Attributes and Design of CL21A105KOFNNNF

The CL21A105KOFNNNF leverages the proven multilayer ceramic structure, comprising a ceramic dielectric body layered alternately with metal electrodes predominantly utilizing Ni/Cu, finished with nickel and tin (Sn) for termination plating. This construction supports stable performance across a wide range of frequencies and varying operational environments. Notably, the device features:

1μF ±10% Capacitance: Sufficient for bypass and decoupling roles in high-density circuits.

16V Rated Voltage: Suitable for standard low-voltage logic and analog rails.

X5R Dielectric: Delivers a tolerance of ±15% capacitance shift over –55°C to +85°C, supporting most commercial and industrial ambient conditions.

0805 (2012 metric) SMD Package: Enabling high-component density and compatibility with automated SMT processes.

The device construction ensures compatibility with high-speed pick-and-place systems and is resilient against common manufacturing stresses.

Electrical Specifications and Capacitance Characteristics of CL21A105KOFNNNF

The electrical behavior of the CL21A105KOFNNNF is influenced by its Class II (X5R) ceramic dielectric. Key considerations include:

Stable Capacitance: Maintained within ±15% over –55°C to +85°C.

DC Bias Effects: Like all MLCCs with high dielectric constant material, capacitance value decreases with increasing DC bias. Designs should account for this when targeting narrow tolerance circuits.

Low Equivalent Series Resistance (ESR): Supporting high-frequency decoupling and filtering applications.

Insulation Resistance: High, providing low leakage in DC-blocking and energy-storage applications.

Dissipation Factor (tan δ): Controlled for typical Class II MLCC usage, with recommendations to use Class I MLCCs for critical timing and low-loss applications.

Impedance Behavior: The device transitions from capacitive to inductive (ESL dominance) at self-resonant frequency. This should be considered in RF or fast switching environments.

Engineers should carefully manage bias, operating voltage, and thermal conditions to ensure target capacitance and reliability are achieved in the system.

Packaging, Size, and Installation Guidelines for CL21A105KOFNNNF

A standard 0805 (2012 metric) SMD outline allows the CL21A105KOFNNNF to be mounted onto most PCB layouts intended for this package size, with recommended land pattern dimensions provided by the manufacturer. The device is supplied in tape-and-reel packaging compliant with IEC 60286-3 standards, compatible with typical high-speed SMT assembly lines.

Mounting considerations include:

Minimizing stress during board handling, cutting, and screw mounting to prevent chip cracks.

Ensuring proper land pad design to balance solder fillet height, reducing risk of mechanical failure post-assembly.

Limiting reflow cycles to three or less for optimal reliability, especially in high-capacitance or thin variants.

Durability Ratings and Environmental Compatibility of CL21A105KOFNNNF

Samsung offers the CL21A105KOFNNNF in three main reliability classes:

Standard: Sufficient for most consumer and general industrial use.

High Level I: Enhanced for greater moisture resistance (tested at 65°C, 90% RH, 500 hours).

High Level II: For more demanding environments (85°C, 85% RH, 1000 hours), e.g., outdoor or base station electronics.

The Standard-grade CL21A105KOFNNNF passes a minimum 2mm bending test and standard derating guidelines (voltage application below 150% of rating during life testing). The product is designed to cope with typical dust, vibration, and mild mechanical shocks encountered in standard PCB assemblies.

CL21A105KOFNNNF’s Appropriateness in Contemporary Electronic Systems

The CL21A105KOFNNNF’s blend of electrical performance and form factor make it widely applicable in:

Consumer Electronics: Smartphones, tablets, laptops, game consoles for decoupling, noise filtering, and energy storage.

Computing and Storage: Used in HDD/SSD boards, memory modules, and processor power domains due to its high capacitance and stable performance.

Networking and Base Stations: Adequate for power supply filtering and decoupling in both indoor and some outdoor platforms, considering the relevant reliability class.

Industrial Power: DC-DC converters and power management modules.

Wearable and Medical Devices: Where miniaturization and stable capacitance over temperature/humidity are critical.

Alternate Versions Associated with CL21A105KOFNNNF

Samsung Electro-Mechanics provides additional variants and related form factors tailored to advanced needs:

Land Side Capacitors (LSC): For ultra-thin applications such as between solder balls or IC packages.

High Bending Strength Series: With ‘soft termination’ features, recommended where mechanical board stress (e.g., large, heavy PCBs, automotive) presents additional risks.

Low Acoustic Noise (THMC/ANSC): Addressing microphonic noise in sensitive analog or audio applications.

Low ESL Types: For ultrahigh-speed energy transfer, ideal for high-frequency decoupling in processor and communications modules.

Engineers should assess whether such variants better match ruggedization or performance requirements per project.

Possible Comparable or Substitute Products for CL21A105KOFNNNF

The 1μF, 16V, X5R 0805 ceramic capacitor is an industry-standard component. Possible alternatives to the Samsung CL21A105KOFNNNF include:

Murata GRM21BR61C105KA01L

TDK C2012X5R1C105K

KEMET C0805C105K4RACTU

AVX (Kyocera) 0805YC105KAT2A

When specifying replacements, verify:

Capacitance, voltage rating, and tolerance are equal or improved.

X5R dielectric performance and construction method (including terminations such as soft vs. standard) match application requirements.

Physical and packaging compatibility for smooth integration into existing assembly lines.

Procedures for Handling, Storing, and Soldering CL21A105KOFNNNF

Ensuring reliability from receipt to end-of-life means observing several best practices:

Handling: Minimize mechanical shock, board flexing, and ESD exposure.

Storage: Keep in environments of 0–40°C and <70% RH, ideally using reels not older than six months from delivery.

Soldering: Observe peak reflow temperatures and dwell times; preheat gradually; avoid excessive solder quantity.

Cleaning: Avoid strong acids, halogens, or aggressive ultrasonic cleaning to prevent insulation degradation.

Testing/Probing: Provide PCB support during bed-of-nails/pin fixtures to avoid MLCC cracking.

Assembly: For adhesives/coatings, match thermal expansion and curing rates to reduce post-cure stress on mounted MLCCs.

Regulatory Standards and Eco-Friendly Features of CL21A105KOFNNNF

The CL21A105KOFNNNF is certified RoHS3 compliant and is not affected by REACH regulations. Its ECCN is classified as EAR99, and it does not contain hazardous materials prohibited under standard global environmental policies. The device also features a Moisture Sensitivity Level (MSL) of 1, meaning essentially unlimited floor life under typical storage and handling conditions, supporting ease of procurement and inventory management.

Conclusion

The Samsung Electro-Mechanics CL21A105KOFNNNF MLCC provides a robust solution for compact, high-performance decoupling, filtering, and energy storage across applications ranging from cutting-edge mobile devices to industrial automation. Its balanced electrical parameters, reliability grades, and form factor flexibility equip engineers and procurement professionals with a dependable, widely compatible passive component. By selecting the right variant and observing proper handling procedures, system designers can maximize long-term stability and performance while adhering to modern compliance standards. For cross qualification or substitution, ensure full consideration of functional and mechanical equivalency to safeguard application reliability in production.